Bio Week 5

Which one of the following terms relating to cardiac output is correct? 

• Cardiac Output (CO) = Stroke Volume (SV) x Afterload (AL)

• Cardiac Output (CO) = Heart Rate (HR) x Stroke Volume (SV)

• Stroke Volume (SV) = Heart Rate (HR) x Cardiac Output (CO)

• Afterload (AL) = Heart Rate (HR) x Cardiac Output

Which of the following chambers of the heart contain deoxygenated blood? 

• Left ventricle

• Left atrium

• Right atrium

Through which structure does blood pass from the right atrium to the right ventricle?

• Interventricular septum

• Ascending aorta

• Tricuspid valve

• Mitral valve

• Bicuspid valve

Which of the following statements regarding blood is correct?

• White blood cells are responsible for clotting

• Red blood cells carry oxygen bound to hemoglobin

• Platelets provide an immune response and fight infection

• White blood cells are the most plentiful and comprise the majority of our blood

Which of the following statements is INCORRECT?

• Each heartbeat begins with an action potential generated by the SA node

• The cardiac cycle lasts ~800 milliseconds

• The bundle branches lie within the interventricular septum between the left and right ventricles

• The cardiac conduction system is crucial for coordinating the contraction of the heart chambers

• The SA node is located in the wall of the left atrium

Your patient has a Blood Pressure of 150/90 mmHg. Which statement below is correct?

• Their Pulse Pressure is 70 mmHg

• Their Mean Arterial Pressure (MAP) is 110mmHg

• Their Systolic pressure is 90mmHg

• Their Mean Arterial Pressure (MAP) is 100mmHg

Which of the following represents the correct path of electrical conduction through the heart?

• SA node, AV bundle, bundle branches, Purkinje fibres, AV node

• SA node, AV bundle, AV node, Purkinje fibres, bundle branches

• AV node, SA node, bundle branches, AV bundle, Purkinje fibres

• SA node, AV node, AV bundle, bundle branches, Purkinje fibres

In which of the following locations are baroreceptors found?

• Jugular Vein

• Abdominal aorta

• Medulla oblongata

• Carotid sinuses

Which of the following statements regarding blood vessels is correct?

• The movement of blood with veins is comparatively low pressure and is facilitated by valves

• The coronary arteries return deoxygenated blood to the heart

• Only arteries have the 3 layers of a tunic interna, tunic media and tunic externa

•  Veins contribute to afterload